Identifiers

Your IDs

ID	Where	Format
Release ID	The `{releaseId}` in the URL	1 to 128 letters, digits, `.`, `_`, `:` or `-`. Unique per account.
Track ID	`tracks[].externalId`	Same format. Unique within the release.
Transfer ID	`transfer.batch` and `{transferId}`	Same format. Unique per account.

AMM Distro also returns its own id for each release and track. You don’t need it for any request.

12 digits (UPC-A) or 13 digits (EAN-13), with a valid check digit. Spaces and hyphens are removed.

New release: optional. Leave it out and one is assigned when the release is approved.
Catalog transfer: required, and must be the release’s existing UPC.

A UPC already used by another release on AMM Distro, outside your account, is refused with 409 upc_in_use.

12 characters: country code, registrant code, year and number, such as USRC17607839. Hyphens and lower case are accepted (us-rc1-76-07839).

New recording: optional. Leave it out and one is assigned when the release is approved.
Catalog transfer: required on every track, and must be the recording’s existing ISRC.
The same recording on two releases (a single and its album): use the same ISRC on both.

No two tracks in one release can share an ISRC. An ISRC that belongs to a recording outside your account is refused with 409 isrc_in_use.

Code	Field	Format
ISWC	`tracks[].iswc`	`T` followed by 10 digits, such as `T1234567890`
IPI	`credits[].ipi`	9 to 11 digits
Spotify artist ID	`artists[].spotifyId`	22 letters and digits, from the artist’s Spotify URL
Apple Music artist ID	`artists[].appleMusicId`	Digits, from the artist’s Apple Music URL